Improvement in nest spiral car-springs



UNITED STATES PATE T QFFICE.

f- RICHARD VOSE, OF NEW YORK, N. Y.

IMPROVEM'ENT IN NEST SPIRAL CAR-SPRINGS.

Specification forming part of Letters Patent No. 119,253, dated September 26, 1871.

To all whom it may concern:

Be it known that I, RICHARD VOSE, of the city, county, and State lof New York, have invented a new and useful Improvement in Spiral Nest-Springs, of which the followin gis a speci' cation, reference being had to the accompanying drawing' forming part thereof.

Figure 1 is a central sectional view of a nest 2is a top view of the same.

Hitherto when spiral springs have been nested, as shown in the drawing', the several spirals have either been made of such relative sizes as to be closely in contact with each other; or, if made of such sizes as to leave spaces between them, they have been leftloose without supports or adjustments, to take their chances of coming in contact or not, as accident or theV movement of the springs might determine.

My invention relates to a nest of two or more spiral springs placed one within another, the several spirals of which are made of such relative sizes that spaces are left between them when all are centrally adjusted, when such central adjustment is secured by making the wire or bar forming the terminal coils of one or more of the spirals of sufcient width laterally to bring the several terminal coils in contact with each other.

The several spirals are made in the usual way, and preferably of rectangular bars of steel, as shown in the drawing. It is preferable, also, to coil the springs alternately right and left, as shown. The diameters of the several spirals are such that when the springs are nested together there shall be suficient space between them to prevent contact when all are centrally adjusted and held in position. Thus, this central adjustof spiral springs embodying my invention. Fig.

, ment is effected by ilattening down theportions of the bar forming the terminal coils a/of the inner spring, whereby they are spread so` as to have an outer diameter` equal to the inner diameter of the outer adjoining spring. In like manner the parts of the bar forming the terminal coils b of the said adjoining or central spiral are enlarged. The object is to bring these coils of the several springs in contact concentrically with each other, while the live coils are left free to move without contact or friction.

It is well known that such contact and conse- .quent friction in nested springs areobjectionable, rendering their action under cars rough and unpleasant, and tending to impair their etlicienoy and durability. My invention furnishes a cheap, convenient, and perfectly successful method of obviating these objections.

I do not here claim, broadly, holding and securing' in relative adjustment with each other the several spirals of a nest of springs so that contact of the live or acting coils of the several springs is prevented, intending here to confine myself to the special method of securing such adjustment and preventing such contact herein described.

What I claim as my invention is- A nest of two or more spiral springs, placed one within another, with spaces between them, constructed and arranged as described, so that by means of the terminal or dead coils of the several springs being concentrically in contact with each other, contact and consequent friction between the elastic or live parts of the springs are prevented, as specified.

RIGHD. VOSE.

Witnesses A. S. FITCH, WM. REDDY. (20) 

